Aluminium fins of triangular profile are attached to a plane wall whose surface temperature is 250 oC. The fin base thickness is 2 mm, and its length is 6 mm. The system is in ambient air at a temperature of 20 oC, and the surface convection coefficient is 40 W/m2·K. (a) What are the fin efficiency and effectiveness? (b) What is the heat dissipated per unit width by a single fin?